com.liferay.portal.servlet.filters.util.LanguageIdCacheFileNameContributor Maven / Gradle / Ivy

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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

package com.liferay.portal.servlet.filters.util;

import com.liferay.portal.kernel.language.LanguageUtil;
import com.liferay.portal.kernel.util.LocaleUtil;

import java.util.Locale;
import java.util.Set;

import javax.servlet.http.HttpServletRequest;

/**
 * @author Carlos Sierra Andrés
 */
public class LanguageIdCacheFileNameContributor
	implements CacheFileNameContributor {

	@Override
	public String getParameterName() {
		return "languageId";
	}

	@Override
	public String getParameterValue(HttpServletRequest request) {
		String languageId = request.getParameter(getParameterName());

		Set availableLocales = LanguageUtil.getAvailableLocales();

		if (availableLocales.contains(LocaleUtil.fromLanguageId(languageId))) {
			return languageId;
		}

		return null;
	}

}